(1) "Head end device" means a device located on the lead
locomotive of a railroad train designed to receive information from
the rear end device. It may also be used to transmit information
to the rear end device;

(2) "Mainline" means a railroad track extending through
railroad yards and between stations which must not be occupied
without authority or protection;

(3) "Rear end device" means a device located on the rear car
of a railroad train designed to transmit information to the head
end device and equipped with a rear marker light, red in color, and
at least one hundred, but not more than one thousand, candela. It
may also be used to receive information from the head end device;

(4) "Telemetry system" means a radio transmitter and receiver
system between a front end device and a rear end device which
indicates through a display at the head end device the following:

(i) Brake pipe pressure at the rear of the train, displayed in
increments of one pound per square inch;

(ii) Rear car movement;

(iii) Whether the rear marker light is operating;

(iv) Remaining battery life powering the system;

(v) Any interruption in radio transmission as established by
a distance measuring device at the rear end device; and

(vi) The location of the rear of the train as established by
a distance measuring device at the rear end device.

(b) It is unlawful to operate a railroad train over one thousand five hundred feet in length on any mainline track within
any railroad yard, without an occupied caboose as the rear car of
such train unless it is equipped with an operable telemetry system.

(c) No train may depart any crew change point or its point of
origin unless the train is equipped with telemetry system as
required by this article. Any inoperable system shall be repaired
or replaced before leaving the point of origin or at crew change
point.

(d) The rear marker light required by this article shall be
flashing during the period from one hour before sunset until one
hour after sunrise.

(e) Beginning the first day of July, one thousand nine hundred
ninety-one, all telemetry devices shall be equipped so that an
emergency application of the brakes of the train can be initiated
at the rear car of the train either by the engineer in the lead or
controlling locomotive or by a crew member riding on the rear car.

It is unlawful to institute any disciplinary action or other
adverse administrative or employment action against any person who
reports a violation or acts to enforce the provisions of this
article. Such person's remedies under this chapter shall be in
addition to any other remedies that might be available to such
person.